/* ========================================
   READING PANE TABS - Pill Style
   WorkPilot v5.2.0
   
   NEW DESIGN:
   - Pill-shaped tabs with icons + labels
   - Monochrome with clear active/inactive states
   - Status indicators (running, complete, error)
   - Horizontal scroll when tabs overflow
   ======================================== */

/* ----------------------------------------
   TAB BAR CONTAINER
   ---------------------------------------- */

.reading-tabs {
  display: flex;
  align-items: center;
  padding: var(--tab-bar-padding, 4px 12px);
  background: var(--color-surface-secondary, #f1f5f9);
  border-bottom: 1px solid var(--color-border, #e2e8f0);
  min-height: var(--tab-bar-height, 36px);
  position: relative;
  flex-shrink: 0;
  overflow: hidden;
}

.reading-tabs:not(.reading-tabs--navbar)[data-visible="false"] {
  display: none;
}

/* Tab list wrapper - THIS is the scrollable element */
.reading-tabs__list {
  display: flex;
  align-items: center;
  gap: var(--tab-gap, 6px);
  flex: 1;
  min-width: 0;
  overflow-x: auto;
  scrollbar-width: none; /* Firefox */
  -webkit-overflow-scrolling: touch;
  scroll-behavior: smooth;
}

.reading-tabs__list::-webkit-scrollbar {
  display: none; /* Chrome/Safari */
}

/* Fade indicators for overflow */
.reading-tabs__fade {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 32px;
  pointer-events: none;
  z-index: 2;
  opacity: 0;
  transition: opacity var(--transition-fast, 150ms);
}

.reading-tabs__fade--left {
  left: 0;
  background: linear-gradient(to right, var(--color-surface-secondary, #f1f5f9), transparent);
}

.reading-tabs__fade--right {
  right: 0;
  background: linear-gradient(to left, var(--color-surface-secondary, #f1f5f9), transparent);
}

.reading-tabs[data-scroll-left="true"] .reading-tabs__fade--left,
.reading-tabs[data-scroll-right="true"] .reading-tabs__fade--right {
  opacity: 1;
}

/* ----------------------------------------
   INDIVIDUAL TAB (Pill Style)
   ---------------------------------------- */

.reading-tab {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: var(--tab-padding, 5px 12px);
  border-radius: var(--tab-radius, 14px);
  border: 1px solid var(--tab-border, transparent);
  background: var(--tab-bg, transparent);
  color: var(--tab-text, var(--color-text-secondary));
  font-family: inherit;
  font-size: var(--tab-font-size, 11px);
  font-weight: 500;
  white-space: nowrap;
  cursor: pointer;
  transition: all var(--transition-fast, 150ms);
  position: relative;
  flex-shrink: 0;
}

.reading-tab:hover {
  background: var(--tab-bg-hover, var(--color-surface-secondary));
  color: var(--tab-text-hover, var(--color-text));
}

.reading-tab:focus {
  outline: none;
}

.reading-tab:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Active tab (light-blue pill) */
.reading-tab.is-active {
  background: var(--tab-bg-active, #DBEAFE);
  color: var(--tab-text-active, #2563EB);
  border-color: var(--tab-border-active, #BFDBFE);
}

.reading-tab.is-active:hover {
  background: #BFDBFE;
  color: #2563EB;
}

/* Tab icon */
.reading-tab__icon {
  font-size: var(--tab-icon-size, 12px);
  line-height: 1;
  flex-shrink: 0;
}

/* Tab label */
.reading-tab__label {
  font-size: var(--tab-font-size, 11px);
  line-height: 1;
}

/* Status badge (after icon) */
.reading-tab__badge {
  margin-left: 2px;
  font-size: 11px;
  line-height: 1;
}

/* Close button — inside the pill, visible on hover */
.reading-tab__close {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 14px;
  height: 14px;
  margin-left: -3px;
  margin-right: -4px;
  padding: 0;
  background: none;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  color: inherit;
  opacity: 0;
  transition: opacity var(--transition-fast), background var(--transition-fast);
  font-size: 9px;
  line-height: 1;
  flex-shrink: 0;
}

.reading-tab:hover .reading-tab__close {
  opacity: 0.5;
}

.reading-tab__close:hover {
  opacity: 1 !important;
  background: rgba(0, 0, 0, 0.1);
}

.reading-tab.is-active .reading-tab__close:hover {
  background: rgba(37, 99, 235, 0.15);
}

/* Original/Compose tabs cannot be closed */
.reading-tab--original .reading-tab__close,
.reading-tab--compose .reading-tab__close {
  display: none;
}

/* ----------------------------------------
   TAB STATUS INDICATORS
   ---------------------------------------- */

/* Running state - pulse animation */
.reading-tab--running .reading-tab__icon {
  animation: tab-pulse 1.5s ease-in-out infinite;
}

@keyframes tab-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* Complete state - green checkmark badge */
.reading-tab--complete .reading-tab__badge::after {
  content: '✓';
  color: var(--tab-complete-badge, var(--color-success));
  margin-left: 4px;
}

.reading-tab.is-active.reading-tab--complete .reading-tab__badge::after {
  color: var(--color-success);
}

/* Error state - red border */
.reading-tab--error {
  border-color: var(--tab-error-badge, var(--color-error));
}

.reading-tab--error .reading-tab__badge::after {
  content: '!';
  color: var(--tab-error-badge, var(--color-error));
  font-weight: 700;
  margin-left: 4px;
}

/* ----------------------------------------
   NAVBAR VARIANT (tabs in the header bar)
   ---------------------------------------- */

.reading-tabs--navbar {
  background: transparent;
  border-bottom: none;
  padding: 0;
  min-height: auto;
  overflow: visible;
}

.reading-tabs--navbar .reading-tabs__list {
  gap: 6px;
  overflow-x: visible;
}

.reading-tabs--navbar .reading-tab {
  padding: 5px 12px 5px 10px;
  font-size: 12px;
  font-weight: 600;
  border-radius: 14px;
}

.reading-tabs--navbar .reading-tab__label {
  font-size: 12px;
}

.reading-tabs--navbar .reading-tab__icon {
  font-size: 11px;
}

/* ----------------------------------------
   SPECIAL TAB STYLES
   ---------------------------------------- */

/* Compose tab - always first, special styling */
.reading-tab--compose {
  /* Slightly bolder presence */
}

/* Original tab - second position */
.reading-tab--original {
  /* Standard styling */
}

/* AI output tabs - can show handler action badge */
.reading-tab--ai-output .reading-tab__action-badge {
  display: inline-block;
  padding: 2px 6px;
  margin-left: 6px;
  border-radius: 4px;
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
}

/* ----------------------------------------
   TAB PANEL CONTENT
   ---------------------------------------- */

.reading-tab-panel-content {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4, 16px);
  background: var(--color-surface);
}

/* Hide content when not active */
.reading-tab-hidden {
  display: none !important;
}

/* ----------------------------------------
   UTILITY: Tab content visibility
   ---------------------------------------- */

/* Hide original content when viewing action tab */
.reading-pane__content[data-active-tab]:not([data-active-tab="original"]) .output-original {
  display: none;
}

.reading-pane__content[data-active-tab]:not([data-active-tab="compose"]) .compose-area {
  display: none;
}

/* ----------------------------------------
   RESPONSIVE: Tablet
   ---------------------------------------- */

@media (max-width: 1024px) {
  .reading-tabs {
    padding: 6px 12px;
    gap: 6px;
  }
  
  .reading-tab {
    padding: 6px 12px;
  }
  
  .reading-tab__label {
    font-size: 12px;
  }
}

/* ----------------------------------------
   RESPONSIVE: Mobile
   ---------------------------------------- */

@media (max-width: 768px) {
  .reading-tabs {
    padding: 4px 8px;
    gap: 4px;
    min-height: 44px;
  }
  
  .reading-tab {
    padding: 6px 10px;
    border-radius: 16px;
  }
  
  .reading-tab__icon {
    font-size: 12px;
  }
  
  .reading-tab__label {
    font-size: 11px;
  }
  
  /* On mobile, hide labels on inactive tabs to save space */
  .reading-tab:not(.is-active) .reading-tab__label {
    display: none;
  }
}

/* ----------------------------------------
   ACCESSIBILITY: Keyboard Navigation
   ---------------------------------------- */

.reading-tabs[role="tablist"] .reading-tab[role="tab"] {
  /* Proper ARIA support */
}

/* High contrast mode */
@media (prefers-contrast: high) {
  .reading-tab {
    border: 2px solid var(--color-text-secondary);
  }
  
  .reading-tab.is-active {
    border-color: var(--color-primary);
  }
}

/* ----------------------------------------
   GUARDIAN TAB VERDICT COLORS (static)
   ---------------------------------------- */

/* Safe (green) — score ≥ 80 and no high issues */
.reading-tab--guardian-safe-color {
  border-color: var(--color-success, #10b981) !important;
  background: rgba(16, 185, 129, 0.08) !important;
  color: var(--color-success, #10b981) !important;
}

/* Review (amber) — score 50-79 or 1 high issue */
.reading-tab--guardian-review-color {
  border-color: var(--color-warning, #f59e0b) !important;
  background: rgba(245, 158, 11, 0.08) !important;
  color: var(--color-warning, #f59e0b) !important;
}

/* Caution (red) — score < 50 or ≥ 2 high issues */
.reading-tab--guardian-caution-color {
  border-color: var(--color-error, #ef4444) !important;
  background: rgba(239, 68, 68, 0.08) !important;
  color: var(--color-error, #ef4444) !important;
}

/* ----------------------------------------
   GUARDIAN RISK TAB PULSE (animated)
   ---------------------------------------- */

/* Caution (red) — score < 50 or ≥ 2 high issues */
.reading-tab--guardian-caution {
  border-color: var(--color-error) !important;
  background: rgba(239, 68, 68, 0.08) !important;
  color: var(--color-error, #ef4444) !important;
  animation: guardian-pulse-caution 2s ease-in-out infinite;
}

.reading-tab--guardian-caution .reading-tab__badge::after {
  content: '⚠';
  color: var(--color-error);
  margin-left: 4px;
  font-size: 12px;
}

@keyframes guardian-pulse-caution {
  0%, 100% { 
    background: rgba(239, 68, 68, 0.06);
    box-shadow: 0 0 0 0 rgba(239, 68, 68, 0);
  }
  50% { 
    background: rgba(239, 68, 68, 0.15);
    box-shadow: 0 0 8px 2px rgba(239, 68, 68, 0.2);
  }
}

/* Review (amber) — score 50-79 or 1 high issue */
.reading-tab--guardian-review {
  border-color: var(--color-warning) !important;
  background: rgba(245, 158, 11, 0.08) !important;
  color: var(--color-warning, #f59e0b) !important;
  animation: guardian-pulse-review 2s ease-in-out infinite;
}

.reading-tab--guardian-review .reading-tab__badge::after {
  content: '⚠';
  color: var(--color-warning);
  margin-left: 4px;
  font-size: 12px;
}

@keyframes guardian-pulse-review {
  0%, 100% { 
    background: rgba(245, 158, 11, 0.06);
    box-shadow: 0 0 0 0 rgba(245, 158, 11, 0);
  }
  50% { 
    background: rgba(245, 158, 11, 0.15);
    box-shadow: 0 0 8px 2px rgba(245, 158, 11, 0.2);
  }
}

/* ----------------------------------------
   GENERIC TAB GLOW (reports, downloads, etc.)
   ---------------------------------------- */

.reading-tab--glow {
  border-color: var(--color-primary, #2563EB) !important;
  background: rgba(37, 99, 235, 0.08);
  animation: tab-glow 2s ease-in-out infinite;
}

.reading-tab--glow .reading-tab__icon {
  animation: tab-glow-icon 2s ease-in-out infinite;
}

@keyframes tab-glow {
  0%, 100% {
    background: rgba(37, 99, 235, 0.06);
    box-shadow: 0 0 0 0 rgba(37, 99, 235, 0);
  }
  50% {
    background: rgba(37, 99, 235, 0.14);
    box-shadow: 0 0 10px 2px rgba(37, 99, 235, 0.2);
  }
}

@keyframes tab-glow-icon {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.15); }
}

/* ----------------------------------------
   TAB LOADING STATE (greyed-out + spinner)
   ---------------------------------------- */

.reading-tab--loading {
  opacity: 0.45;
  pointer-events: none;
  cursor: default;
}

.reading-tab--loading .reading-tab__icon {
  opacity: 0.5;
}

.reading-tab__spinner {
  display: inline-block;
  width: 12px;
  height: 12px;
  border: 2px solid var(--color-border, #e0e0e0);
  border-top-color: var(--color-primary, #2563EB);
  border-radius: 50%;
  animation: tab-spinner 0.7s linear infinite;
  margin-right: 4px;
  flex-shrink: 0;
}

@keyframes tab-spinner {
  to { transform: rotate(360deg); }
}

/* ----------------------------------------
   NUMERIC BADGE COUNT
   ---------------------------------------- */

.reading-tab__badge--count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  margin-left: 6px;
  border-radius: 9px;
  background: var(--color-primary, #2563EB);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  line-height: 1;
}

.reading-tab.is-active .reading-tab__badge--count {
  background: rgba(255, 255, 255, 0.3);
  color: #fff;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .reading-tab,
  .reading-tab__close,
  .reading-tabs__fade {
    transition: none;
  }
  
  .reading-tab--running .reading-tab__icon {
    animation: none;
  }

  .reading-tab--guardian-caution,
  .reading-tab--guardian-review,
  .reading-tab--glow {
    animation: none;
  }

  .reading-tab--glow .reading-tab__icon {
    animation: none;
  }

  .reading-tab__spinner {
    animation: none;
  }
}